We diagnose the actual water source before we quote anything — no guessing, no upsell, just a plan sized to your basement.

Basement waterproofing mistakes usually come down to one thing: fixing the symptom instead of the source. A contractor who paints over a wet wall without checking cove joint condition or exterior grading is setting you up for the same call again in a year or two.
We're bonded and insured for both residential and light commercial basement work across Long Lake, MN.
Most inspection requests get a same-day or next-day appointment, not a two-week wait.
No hourly billing and no change orders once your basement floor is already open.
Thermal imaging helps us confirm whether a stain is active moisture or an old, already-fixed leak.

We scope every Basement Waterproofing job in person before quoting it, since two properties with the same symptom rarely need the same fix.
The core fix for most Long Lake, MN basements: a perimeter drain cut into the slab edge, tied to a sump basin, that intercepts water before it reaches the floor.
Battery backup is available for any sump system, so a power outage during a storm doesn't undo the whole fix.
Vertical wall cracks get epoxy or polyurethane injection depending on whether they're still actively weeping.
A dimpled plastic membrane behind any finished basement wall channels residual moisture down to the drain tile instead of trapping it behind drywall.
Window wells that hold water after a storm are a direct pressure point against the glass and frame — we add gravel beds and drain lines tied into the main system.

You describe what you're seeing — a wet spot, a musty smell, standing water — and we get a rough read on urgency before dispatching anyone.
We also check exterior grading and downspouts, since a lot of basement leaks start outside, not inside.
We explain the reasoning behind the recommended system so you know exactly what you're paying for and why.
Most residential basement jobs finish in one to three days, and we test the sump pump under load before we leave.

"Our finished basement started smelling musty and we finally found a wet spot behind the drywall. They cut open the cove joint, ran drain tile, and it's been dry for over a year."
— Long Lake Homeowner
"Water came in around our window well every time it rained hard. They regraded it and added a drain line — problem solved."
— Long Lake Customer
"They walked us through exactly why the water was coming in before quoting anything, which no one else had bothered to do."
— Long Lake Homeowner
"Installed a battery backup sump pump for us right before a big storm season — glad we did it when we did."
— Long Lake Customer
Cost depends on linear footage, sump basin size, and whether cove joint sealing is included — we won't give a number without an in-person inspection.
We keep the cut as narrow as possible and clean up debris before leaving the site.
Most residential interior drain tile and sump installations finish in one to three days depending on basement size.
If the crack is actively weeping or part of a larger drainage issue, we'll recommend a full system instead of a spot fix.
Coverage depends on your policy and the cause of the water intrusion — we can document conditions for a claim, but approval is up to your insurer.
Yes, every interior drain tile and sump installation comes with a written warranty, explained in full before you approve the quote.
We install interior drain tile and sump systems throughout Long Lake and the surrounding Long Lake, MN service area, including the zip codes listed below.



Zip codes we serve in Long Lake, MN: 55356
One call gets you a licensed specialist, a written quote, and a same-day time window.
Call +1-866-476-1348© SGP Waterproofing. All rights reserved.